Which one of these equations is correctly written in Standard Form?

x + 2y = −10

x + y = −5

2x + 5.5y = −5

−2x + y = −10

Question

Which one of these equations is correctly written in Standard Form?

 x + 2y = −10

 x + y = −5

 2x + 5.5y = −5

 −2x + y = −10

anonymous · Answer

ax+by=c

anonymous · Answer

I'm thinking the third one

anonymous · Answer

could you explain why?

anonymous · Answer

Because there is a coefficient in front of x and y

anonymous · Answer

I don't think they always have to have coefficients though...

anonymous · Answer

So what do you think it is?

anonymous · Answer

"a" has to be a positive integer

anonymous · Answer

So it can't be the last one

anonymous · Answer

I wasnt sure so I asked for help, they all seemed alright to me. Although i havent seen a decimal used in slope though.

anonymous · Answer

So thats just it..? Hmm is there something missing that you might of forgot to type?

anonymous · Answer

brb

anonymous · Answer

It was the first. The second and fourth were wrong, and the third is wrong because it's not a whole number. Thanks for helping.